It sounds about right, Bruce. Look forward to hear your findings. Jostein 2009/7/10 Bruce Dayton <[email protected]>: > Ok, I'll try to duplicate your basic test with my flash and DA* 16-50 > and see what I get. > > So if I understand, I should set the camera to manual exposure and > set the flash to manual zoom. Probably shoot at a neutral target > that looks just the same no matter what the zoom on camera and flash > are - like a big, blank wall. Then shoot at each zoom range of the > flash. I assume that the lens should be at the same focal length as > set on the flash zoom. > > Does this sound about right for the test? > > -- > Best regards, > Bruce > > > Friday, July 10, 2009, 10:11:20 AM, you wrote: > > A> 2009/7/10 Bruce Dayton <[email protected]>: >>> How did you happen to notice this behavior? > > A> Many of the DA lenses will focus closer than the recommended minimum > A> distance for the flash. I was going through how my various lenses > A> performed with the flash at close focus. This experiment turned out > A> quite well, in the sense that P-TTL copes with the short distances. > A> However when playing with the DA*16-50 I decided to check if it was > A> consistent across the zoom range of the lens. The flash was set for > A> auto zoom to match the zoom setting on the lens. That's when I got > A> overexposure on the long end. Same thing with DA 16-45/4. That's when > A> I switched to manual zoom and compared the flash output at each > A> setting. > > A> Jostein > > > > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. >
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